M107 (NGC 6171)
Messier 107 (NGC 6171) is a globular cluster located in the constellation Ophiucus, in the Galactic Center of the Milky Way Galaxy in the Local Group of galaxies. M107 is 21,000 light years away from Earth.
M107 is best viewed during mid-summer, is magnitude 8.9, and can be viewed with binoculars. M107 is 10' in apparent size. For reference, the full moon is 30' (arc minutes) in size.
* The naked eye can see up to magnitude 8 objects under ideal dark sky conditions.